Geochemistry Of Groundwater In Shallow/Deep Bore Wells And Relationship With Geological Formations

摘要

Studied area is a tribal area of Warangal District, Andhra Pradesh (A.P.), India. This is (17°42′18″ - 18°36′45″ N and 79°51′04″ - 80°42′23″E) about 4100 sq. km and has different types of rock formation such as granite gneisses, sandstones, pakhals and alluvium etc. This area was facing groundwater problems since two decades. In 1996, National Geophysical Research Institute, Hyderabad did geophysical survey for groundwater exploration collaboration with State Ground Water Department, A.P. Based on geophysical investigation, a large number of drilling sites were recommended and subsequently 40 bore wells were drilled (10.0 to 70.5 m depths). The water table in these bore wells, varies from 5.0 to 15.0 m with discharge rate of 10,000 to 25,000 lit/h. The hydrochemical studies of these waters indicate: 1. Concentrations of aqueous ionic species have changed with different rock types. 2. Groundwaters of granite gneisses areas are more in Total Dissolved Solids (TDS). 3. These groundwaters are classified as Na-Ca-Cl -